Modulatory Role of Pre-orthostatic Cold-Water Ingestions on the Electroencephalogram

Abstract

Background: Literature is replete with the adverse outcomes of the cold impacts of climate change. The aim of the study was to investigate the effect of pre-orthostatic cold water ingestions on the electroencephalogram in male individuals. Methods: 35 apparently healthy young males averaging 19.5years satisfied the inclusion criteria and were selected for the study. Participants ingested 500militers of portable commercial water at 250c and 100c five minutes prior to sitting or orthostasis. Orthostasis lasted for minutes. Electroencephalogram (EEG) was recorded using PowerLab 26T with eye opened. On assumption of erect position, EEG recording was started and continued for 20 minutes during which the standing lasted. Results: Ingestion of 250c or 100c water prior to orthostasis has no significant effect on alpha wave frequency when compared to baseline. Beta wave frequency and alpha/beta ratio were significantly higher and lower in participants who ingested 250c prior to orthostasis when compared to those who ingested 250c prior to sitting respectively. Beta wave frequency and alpha/beta ratio also increased and decreased respectively in participants who ingested 100c prior to orthostasis when compared to those who ingested 100c prior to sitting. Ingestion of 250c prior to orthostasis caused higher beta wave frequency and lower alpha/beta ratio when compared to participants who ingested 100c prior to orthostasis. Conclusion: The findings of the study demonstrated that ingestion of 250c water prior to orthostasis was associated with relatively greater cortical activation.